Features
Core: Arm® 32-bit Cortex®-M0 CPU, frequency up to 48 MHz
Memories
16 to 256 Kbytes of Flash memory
4 to 32 Kbytes of SRAM with HW parity
CRC calculation unit
Reset and power management
Digital & I/Os supply: VDD = 2.4 V to 3.6 V
Analog supply: VDDA = VDD to 3.6 V
Power-on/Power down reset (POR/PDR)
Low power modes: Sleep, Stop, Standby
Clock management
4 to 32 MHz crystal oscillator
32 kHz oscillator for RTC with calibration
Internal 8 MHz RC with x6 PLL option
Internal 40 kHz RC oscillator
Up to 55 fast I/Os
All mappable on external interrupt vectors
Up to 55 I/Os with 5V tolerant capability
5-channel DMA controller
One 12-bit, 1.0 µs ADC (up to 16 channels)
Conversion range: 0 to 3.6 V
Separate analog supply: 2.4 V to 3.6 V
Calendar RTC with alarm and periodic wakeup from Stop/Standby
11 timers
One 16-bit advanced-control timer for six-channel PWM output
Up to seven 16-bit timers, with up to four
IC/OC, OCN, usable for IR control
decoding
Independent and system watchdog timers  SysTick timer